cmake BUGFIX don't install ${LIB_HEADERS} in /usr/include
cmake BUGFIX don't install ${LIB_HEADERS} in /usr/include

* This shouldn't be installed there as `values.h` causes file collision with
  glibc, and we are already installing `sysrepo.h` and `sysrepo_types.h`
  in `/usr/include` anyway, so let's just remove it from the install
  command

Signed-off-by: Jakov Smolic <d7de33b854c7ca8b4c2b996b8e18cb8d82743062@sartura.hr>

sysrepo/sysrepo,sysrepo/sysrepo,sysrepo/sysrepo